Gas heater



lJune 24, .1930.

A. B. MILLER ETAL GAS HEATER Filed May 11. 1929 y. y y, m W

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GAS HEATER Filed May 11, 1929 3 Sheets-Sheet 2 IN V EN TOR.

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June 24, 1930. A. B. MILLER ET N-l GAS HEATER Filed May 11. 1929 S'Sheets-Sheet 5 INVENToR.

ALBERTB. MILLE/ WA L TER H. HELL/VER B-Y f/m A TTORNEYS.

Patented June 24, 1930 UNITED STATESy ATE oFFic ALBERT B. MILLER AND WALTER H. KELLNER, F GREEN BAY, WISCONSIN Y GAS HEATER Application led May 11, 1929. SerialNo. 362,220.

This invention appertains to heating appliances and is an improvement on our prior Patent 1,628,487, granted tous April 5, `1927.

One of the primary objects of our invention is to provide a'novel gas heater primarily intended for the use of heating houses and the like, and which is adapted to be suspended beneath the floor of a room or hall of the house to be heated and which embodies l0 novel means for carrying olf all fumes generated by the burner eXteriorly of the house and thereby eliminate all danger incident to the use of gas heating appliances.

Another important object of our invention is the provision of novel means for leading fresh air to the burner from the exterior of the house and novel means for carrying the fumes from the burner out of the house, with novel means for permitting the air to be heated for circulating about the burner' and its associate parts up into the house or room to be heated, the air being heated being entirely independent of the air utilized for supporting combustion in the burner.

A further object of our invention is the provision of a novel conical air heating baliie arranged on the burner, the conical baiile including a plurality of hollow radial fins through which the fiance and products of 3o combustion flow, the air to be heated for the house circulating around the radial fins and thence into the house.

A further object of our invention is the provision of an annular fume drum receiving the products of combustion from the conical baii'le, the drum having a pipe communicating therewith for leading the products of com-V bustion exteriorly of the house, the drum also forming means for heating the air cir- 40 culating about the same.

A further object of our invention is the provision of a humidifying cup carried by and sealing the lower end of the conical baffle with means for maintaining a constant supply of liquid in the cup, whereby t-he heated air will be humidified prior to the delivery thereof into the house, the cup having a ground connection with the conical baille to prevent the entrance of fumes from the burner into the air being heated.

A further object of our invention is the provision of novel means for controlling the air to the burner, a certain portion of the air being delivered above the burner and a certain portion to a gas mixing chamber coin- 155 municating with the burner, and a Valve plate for controlling the flow of air into the mixing chamber.

A further object of our invention is the. provision of a circular baille plate surrounding the conical baille and fume drum, which Vserves as means for leading the air to be heated toward the burner, baiiie and heating drum and also as means for keeping the casing in which the burner is disposed in a cool cong5 dition. A

A further object of our invention is the provision of-novel means for leading the fume pipe through the fresh air pipe for the burner, whereby the fresh air pipe will serve as a protector for the fume pipe and as means for permitting thepreheating of the fresh air prior to the delivery thereof to the burner.

A still further object of our invention is to generally improve the construction of our prior patent, above mentioned, and toV provide a gas burner which will be durable and efficient in use, one that will jbe simple and easy to manufacture'and one which can be placed upon the market at a reasonable cost.

4`With these and other objects in view, the invention consistsin the novelconstruction, arrangement and formation of parts, as will be hereinafter more specifically described, claimed, and illustrated inthe accoinpanying drawings,in which: t

Figure 'l vis a vertical central section through our improved gas heater;

Figure 2 is a horizontal section taken on the line 2-2 of Figure l looking in the' direc- 99' tion ofthe arrows showing our improved burner in top plan; Y l

p Figure 3 is a detail end view of the fresh air pipe illustrating the valve for controlling the entrance of the fresh ai chamber; e

Figure 4 is a detail horizontal section taken on the line 4-4 of Figure 1 looking in the direction of the arrows showing the conical baflie in top plan; 100

r into the mixing Figure 5 is a horizontal section taken on the line 5 5 of Figure 1 looking in the direction of the arrows showing the conical baflie in bottom plan;

Figure 6 is a vertical section through the conical baiiie taken on the line (5-6 of Figure 7 Figure 7 is a horizontal section through the conical baille taken on the line 7 7 of Figure G looking in the direction of the arrows;

Figure 8 is an enlarged fragmentary horizontal section through the conical baffle taken on the line 8-8 of Figure 6 looking in the direction of the arrows and illustrating the formation of the novel hollow feeding fins;

Figure 9 is a horizontal section taken on the line 9 9 of Figure 1 looking in the direction of the arrows showing the burner in top Plan;

Figure 10 is a horizontal section taken on the line 10-10 of Figure 1 looking in the direction of the arrows illustrating the connection of the air and gas mixing pipe with the gas burner;

Figure 11 is an enlarged fragmentary vertical section illustrating in detail the connection between the conical baffle, the burner and the humidifying cup, and

Figure 12 is an enlarged fragmentary vertical section illustrating in detail the air supply for the burner and showing the valve plate for controlling the direct supply of air to the burner.

Referring to the drawings in detail, wherein similar reference characters designate corresponding parts throughout the several views, the letter A generally indicates our improved heating appliance which includes a casing 15 formed of sheet metal or the like, which receives the burner proper 25, the conical baffle 45 and the fume and heating drum 55.

The asing 15 includes side and end walls 16 and 17 and a bottom wall 18. The side and end walls can be provided with an outturned lateral attaching flange 19 for con nection with the floor 2OA of a building B, which is to be heated. These side and end walls can also be provided with an inwardly extending flange 21 for supporting a licor register, which can be raised when it is desired or necessary to light the burner.

Extending into the lower end of the casing 15 through one end wall 17 thereof is an air pipe or chamber 22 having its inner end closed and its outer end open for connection with a head23 which receives the air and gas mixing pipe 24 disposed above the air pipe or chamber 22 and which air and gas mixing pipe 24 communicates with the burner proper 25, which will now be described.

The burner 25 comprises an annular flared body including the inner and outer spaced walls 2G and 27 and a top wall 28 having a plurality of burner outlet openings 29 therein. The upper edge of the outer wall 27 ex tends above the top wall 28 to provide a flange 30 which forms a seat for the conical baflie 45, which will be later described. The lower edges of the inner and outer walls 26 and 27 are provided with annular ribs 3l which are fitted in annular grooves 32 formed in the top face of the plate 33 which is fitted on top of the air pipe or chamber 22 and around an air outlet opening 34 therein. Thus the plate 33 forms a bottom wall for the burner and the burner assembly is secured by means of bolts 35 to the air chamber 22, which bolts extend through suitable radially extending lugs v3G formed on the outer wall 27 of the burner.

Thus it is to be noted that the inner wall 2G of the burner fiares outwardly from the opening 34 and constitutes a central air passageway for conducting air above the burner openings 29.

The air mixing pipe 24 leads into the burner through one side thereof as at 37 so that the air and gas will tend to fiow around the burner and thus be evenly distributed to the burner openings 29. The forward end of the mixing pipe 24 is flared as at 88 toward its outer end and is likewise extended into the head 23 and the entrance of air into the mixing pipe 24 is controlled by a slide valve plate 39 which is provided with a guide rod 40 extending' through the upper and lower walls of the head The lower end of the rod is provided with a weight 41 for knormally maintaining the valve plate 39 in a closed position and a suitable chain 42 is connected to the upper end of the rod and extended to the desired point and operated in any preferred way for opening said valve. A fresh air conduit pipe 43 receives the head 23 and this pipe is extended to the exterior of the building for drawing fresh air into the device. A gas feed pipe 44 is led into the mixing pipe 24 adjacent to the forward end thereof so as to feed gas in the air stream and either natural or artificial gas can be employed. From the construction so far, it can be seen that a free flow of air is permitted into the air chamber 22 and thence into the central portion of the burner and that air under control is admitted into the mixing pipe or chamber 24 and combines with the air and enters into the burner itself.

As stated, the flange 3() forms a seat for the conical baflie 45 which forms an importtant feature of our invention and which will now be described.

Uur improved conical baffle 45 includes a plurality. of equi-distantly spaced radially extending hollow fins 46 which converge toward the lower ends thereof and the lower ends of the fins areconnected by an annular plate or wall 47 having openings 47 therein communicating with the hollow fins. The

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upper enc s of the iins 46 are closed and are connected by an annular vertically disposed ring 48 having` its `upper end internally threaded as sit-49 tor the reception of the fume chamber or drum 55. The lower end of the ring' 48 is provided with an inwardly extending annular ground seat 5() Whichalso has connection with the` drum as will be later described. rlhis ring 48 is provided with a plurality of outlet openings 5] which Communicate with the interior of the conical baille between the threaded 'portion 49 of the ring` and the seat 50, as can be readily secn by referringto Figure 6 of the drawings. The lower tace of the annular plate 47 at its pe* riphery is rabbeted as at 52 for receiving the flange and'tor forming an intimate contact therewith and the inner face of the plate is likewise proifided with a` ground seat 53 for a` purpose which will also be later described. The spaces between tue hollow fins 46 form air circulating slots 54, for a purpose which will be later brought out.`

lle tei-ring to the fume drum or chamber 55, the same includes an annularf hollow vertically disposed outer rim portion 56 and a central dependinghub portion 57 which isconnected with the hollow rim 56 by hollow tubular arms or spokes 5S. The central hub por-v tion 57 ofthe fume chamber includes inner and outer spaced walls 59 and 60 defining an annular chamber 6l therebetween `and the lower edge of the outer Wall 60 is threaded so as to have threaded connection with the threaded portion 49 of the' conical baille. rl`he inner wall 59 extends below the outer wall 60 and is providedwith a iared seat 62 for engagement with the `ground seat 50 on the bailleland when the baille is threaded on the drum, the seat or flange 62 will be forced on its seat to form an intimatecontact 'with the baille. Communicatingwith one side ot the rim 56 oit the fume chamber or drum 55, is the fume outlet pipe 65 which likewise leads to the exterior of the house or building. We

prefer to lead the fume outlet pipe G5 through the air inlet pipe 43 to the exterior of the lniilding, so that the said pipe will form a pro.V

tection therefor and thus prevent accident should the fume pipe 'become overheated and to also permit the incoming fresh airto be preheated by said pipe. priork to the entrance ofthe fresh air into the burner andv above the burner. y

le can also arrange a pivoted damper 66 in the length of the pipe 65 which damper is normally held in v.an openV position by a weighted arm 67 and the damper can be closed whennecessa-ry by a suitable cable or chain 68.' V

ln conjunction with the burner we utilize a humidifying; device which embodies a humidifying` cup 69 which is fitted within the gro-und seat 53. of the conical baille 45 and closes the lower endthereot. It desired, this .the fume the register thus the air becomes warmed through Contact` cup 69 can be cemented or otherwise secured in place to form an air tight joint. Any preferred means can be utilized for maintaining a constantlevel Vof water or 'other liquid in the cup and as shown, a supplypipe 70 leads into the bottom oi ,the cup and sediment trap 71 can be employed for cleaning out and letchingthe dirt. Y 'lhus moisture is supplied to the heated air giving a beneficial heat.

We arrange a pilot burner 72 directly above one of the burner openings and a suitable rabove each burner opening 29. p Air is also admitted inte the mixing chamber 24 which mixes with the pgas from the pipe 44 and this mixture flows intothe burner and outfo the burner openings29 where the saine is ignited. The products of combustion flow up through the hollow iins int-o the hub 57 of the fume chamber, through the hollow arms 58 thereof into the hollow rim 56 and thence out into conduit pipe 65 to the atmosphere. The-air to be heated circulates around the line `and around the drum andup through into theihouse to be heated, and

with the fins and also prevents l'iecoining overheated.

By this arrangement*there is nopossible chance ot any of the mnes'or products of combustion 'from the gas burnerentering into the air being heated for thehouse and the direct tlowoffair conveying the products of. combustion out of the burner at all times, leading Vto the exterior of the lio-use.

le can provide a plug 75 in the :fume chainthe lins from ber 55 for .initially lightingthe burner and when the burner is lighted the valve plate 39 is allowed. to move to its fully closed position, thus cutting` oilzthe supply of air to the burner proper and a matchis then applied to the plugopening,which will ignite the gas and the "pilot burner 72. The threaded back into place and thevalve' 39 can be raised to supply the proper amount Of aiuto the burner. Q 'K `By raising and lovverii'ie this valve plate 39, the proper burning ofthe device can bek regulated. j c f g Y y The damper plate (S6-is `utilir/Jedor facilitating'the lighting; of the burner and is especially useful in -cold Weather `and this damper can be moved to itsclosed position upon the initial lighting of the burner and to momentarily retain the the gas inthe bailley so that all of the burner openings will become ignited.

Vile can also employ depending baille plate or pipe to partially surround the conical baille l5, so to protect the walls oit' the casing from undue heat and to lead the air to be heated under and around the conical baille l5 and thence around the luine chamber 55 to the room to be heated.

lt desired, the gas heater can be placed in a cabinet in a room, instead ol the casing 15, as shown.

Changes in details may be made without departing` from the spirit or the sco-pe of this invention.

vWhat we claim asiiew is:

l. A heating appliance comprising an air chamber ha -ing an air outlet opening, a gas burner orp hollow annular construction having a plurality ol burner outlets and fitted over the air opening, an air and gas mixing pipe communicatingl with the hollow burner, a head receiving the air chamber and the air and gas mixing pipe, a fresh air conduit pipe connected to the head and leading from the outside ot the building to be heated, means tor controlling the low of air into the air and gas mixing pipe, an air heating baille arranged to receive the air from the air chamberand the products ot combustion from the burner, and means for receiving the products oic combustion from the baille and for leading the saine exteriorly ot the building.

2. A heating appliance cominising an air chamber having an air outlet opening, a hollow annular `gas burner surrounding the opening, an air and gas mixing pipe communicating with the hollow burner, the burner being provided with a plurality of burner outlet openings, a gas supply pipe communicating with the mixing pipe, a fresh air pipe having communication with the air chamber and the air and gas mixing pipe and leading from the exterior of the building to bejheated, means for controlling the entrance of air into the air and gas mixing pipe, an air heating 'baille arranged over the buriier for receiving the products of combustion therefrom, a fume chamber arranged on the air heating baille for receiving the products of combustion, a fume conduit pipe .leading from the fume chamber to the exterior of a building to be heated, and a normally open damper in said fume pipe.

3. A heating appliance comprising an air chamber having an air outlet opening, a hollow annular 4gas burner surrounding said opening and haifing a plurality of burner outlets, an air and gas mixing pipe communicating with the burner and arranged substantially tangential thereto, a gas 'supply pipe communicating with the air and gas mixing pipe, a lresh air conduit pipe leading from the exterior of a building to be heated and having communication with the air chamber Y ring, a gas supply pipe and the air and gas mixing pipe, a valve for controlling the flow of air into the air and gas mining pipe, a conical air heating baille including a plurality ol hollow radially extendiner ins arranged over the burner for receiving the products of combustion therefrom, a lin being disposed above each burner opening, a humidilyiiig cup received in the conical air heating barile and sealing the lower end thereof for leading the products of combustion into the hollow iins, a lume chamber lit-ted over the conical bal-lle and having an annular inner wall engaging the inner poition of the baille and having the interior thereof communicating with the hollow tins for receiving the products ot combustion therefrom, and a lume conduit pipe coininunicating with the l'unie chamber and leading to the outside ot the building to be heated.

4. A heating appliance comprising an air chamber having an air opening therein, an annular hollow gas burner ring surrounding said opening and provided with a plurality ol' gas burner outlets, an air and gas mixing pipe communicating with the hollow burner ring, a gas supply pipe leading into said air and gas mixing pipe, a fresh air conduit pipe communicating with the air chamber and air and gas mixing pipe, means lor controlling tlie ilow of air into said air and gas mixing pipe, a pilot burner for the gas burner, the gas burner being provided with an annular flange seat at its upper edge, a conical baille member including a plurality of downwardly converging hollow lins and a bottom plate provided with openings communicating wi'h the tins,a hollow lin being arranged above each burner opening, the ring being rabbeted at its periphery to fit upon-said flange seat, the inner Jface of the plate beingl provided with a ground seat, an annular vertically disposed ring connecting the upper ends of the fins and having openings therein communicating with the u pei ends of said hollow fins, a fume cham er including an annular hollow rim, a hollow central hub portion and radially extending hollow spokes connecting the rim and the hollow hub together, the hub including an inner depend-I ing wall connected with the lower portion ol the ring of the baille and an outer wall connected with the upper end of the ring of the baille, a huinidifying cup fitted on the seat of the plate, means for supplying liquid at a constant level tothe cup, and a Jfume conduit pipe communicating with the hollow ring ot the fume chamber and extended to the exterior ot a building.

5. A heating appliance comprising an air chamber having an air opening therein, an annular hollow gas burner ring surrounding said opening and provided with a plurality of burner outlets, an air and gas mixing pipe communicating with the hollow burner leading into said air 'bottom plate provided and gas mixing pipe, a :fresh air conduit pipe communicating with the air chamber and air und gas mixing pipe, means for contrfflling the llow oi air into said air and gas mixing pipe, a pilot burner for the gas burner, the gus burner being provided with an annular ilange seat at its upper edge, a conical barile member including a plurality of downwardly eonvergingr hollow and a bottom plate provided with openings communicating with the fins, a hollow iin being arranged above each burner opening, the ring being rabbeted at its periphery to fit upon said ilange seat, the inner face oi the plate being provided with a ground seat, an annular vertically disposed ring connecting the upper ends oi the iins and ha 'ing `openings therein communiating with the upper ends oi' said hollow iins, a fume chmnber including an annulaihollow ri in. a hollow central hub portion and radially extending hollow spokes connecting the rim and the hollow hub together, the hub including en inner depending wall connected with the lower portion of the ring` oi the baille and an outer wall connected with the upper end oi the ring oi the baille, a humidiiying cup iitted on the seat oi the plate, means Jr'or supplying liquid at a constant level to the cup, and a iume conduit pipe communicating' with the hollow ring oi the fume chamber and extended to the exterior ci a building. said i'ume conduit pipe being extende-zl through the i'resh air inlet pipe and provieiled with a control dining-er.

6. il heating appliancecomprising an air chamber ha ring an air opening therein, un annular hollow gas burner ring` surrounding said opening and provided with aplurality oi gas burner outlets, an air and @as mixing pipe con'nnunieating with the hollow burner ring, a gas supply pipe leading into said air and gas n ling pipe, a fresh air conduit pipe communicating with the air chamber and air and gas mixing pipe, meansfor controlling the iiowroi air into said air and gas mixing pipe, a pilot burner for the gas burner, the gas burner being provided with an annular ilange seat at its upper edge, a conical baille member including a plurality oi downwardly converging hollow iins and a with openings communicating with the iins, a hollow lin being arranged above each burner opening, the ring being rabbeted at its periphery to lit upon said iiange seat, the inner face oi the plate being provided with a ground seat, an annular vertically disposed ring connecting the upper ends oi the iins and having open ings therein communicating with the upper ends oi said'hollow iins, a inn e chamber including an annular hollow rim, a hollow central hub portion and radially extending hollow spokes connecting the rim and the hollow hub together, the hub including` an inner depending wall connected with theV lower portion ol the ring ci the baille and an'outer wall connected with the upper end 'oi the ring oi the baille, a l'iumidifying cup iitted on the scat o'l the plate, .means 'lor sup'- p'lying liquid at a constant level to the cup, a i'ume conduit pipe connnunicating with the hollow ring of tl e fume chamber and extended to the exterior oi a building, said oi gas burner outlets, an air and gas mixing pipe connnunicatiug with Jdie hollow burner ring, a gas supply pipe leading into said air and gas mixing pipe, a fresh air conduit pipe con'nnunicating with the air chamber and air and gas .mixing pipe, means iorcontrolling the iiow of air into said air and gas mixing pipe, a pilot burner 'for the gas burner, the burn-er being provided with an annular flange seat at its upper edge, a conical baille member including'a )lurality oi' downwardly converging hollow iins and a bottom plate provided with openings communicating with the tins, hollow lin being arranged above cach burner opening, the ring being rabbeted at its periphery to iit upon said iiangc scat, the inner i'ace of the plate being provided with. a ground seat, an annular vertically disiioeed ring connecting the upper ends oi the iins and having openings therein com1nuieating with the upper ends oi said hollow iins, a fiume chamber iicluding an annular hollow rim, a hollow central hub portion and radia1 extending hollow spokes connecting the run and the hollow hub together, the hub including an inner depending wall vconnected with the lower portion of the ring of the baille and an outer wall connected with the upper end of the ring` of the baille, a humidiiying cup lit-ted on the seat of the plate, means for supplying liquid at a constant level to the cup, a V:lume conduit pipe communicating with the hollow ring of the fume cham* ber anu extended to the exterior of a build ing, said fume conduit pipe being extended through the fresh air inlet pipe and provided with a control damper, a housing for the burner, the battle andtl e iume chamber, and a depending' baiiie plate arranged in the easing around the iume chamber and heme and terminating short-ol the lower end oi said i casing.

testimony wnereoi we aiiix our signaturesJ ALBERT B. MLLER.

f WAL'lEl-- H. KELLNER. 

